Making CUPS calls non-blocking....

printing/backend/print_backend_cups.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "printing/backend/print_backend.h"
 
 #include <dlfcn.h>
 #include <errno.h>
 #if !defined(OS_MACOSX)
 #include <gcrypt.h>
@@ skipping 190 matching lines @@
   }
   GURL print_server_url(print_server_url_str.c_str());
   return new PrintBackendCUPS(print_server_url);
 }
 
 int PrintBackendCUPS::GetDests(cups_dest_t** dests) {
   if (print_server_url_.is_empty()) {  // Use default (local) print server.
     return cupsGetDests(dests);
   } else {
     HttpConnectionCUPS http(print_server_url_);
+    http.SetBlocking(false);

[sanjeevr, 2010/12/15 23:06:30]

Since this is a generic helper, perhaps pass a bool requesting non_blocking
mode?

     return cupsGetDests2(http.http(), dests);
   }
 }
 
 FilePath PrintBackendCUPS::GetPPD(const char* name) {
   // cupsGetPPD returns a filename stored in a static buffer in CUPS.
   // Protect this code with lock.
   static Lock ppd_lock;
   AutoLock ppd_autolock(ppd_lock);
   FilePath ppd_path;
@@ skipping 32 matching lines @@
                    << ", content length: " << content_len;
         file_util::Delete(ppd_path, false);
         ppd_path.clear();
       }
     }
   }
   return ppd_path;
 }
 
 }  // namespace printing